c59a576c86
This CL modifies the refactored render buffering scheme in AEC3 so that: -A non-causal state can never occur which means that situations with nonrecoverable echo should not occur. -For a stable audio pipeline with a predefined API call jitter, render overruns and underruns can never occur. Bug: webrtc:8629,chromium:793305 Change-Id: I06ba1c368f92db95274090b08475dd02dbb85145 Reviewed-on: https://webrtc-review.googlesource.com/29861 Commit-Queue: Per Åhgren <peah@webrtc.org> Reviewed-by: Gustaf Ullberg <gustaf@webrtc.org> Cr-Commit-Position: refs/heads/master@{#21215}
77 lines
2.5 KiB
C++
77 lines
2.5 KiB
C++
/*
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* Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MODULES_AUDIO_PROCESSING_AEC3_RENDER_BUFFER_H_
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#define MODULES_AUDIO_PROCESSING_AEC3_RENDER_BUFFER_H_
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#include <array>
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#include <memory>
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#include "api/array_view.h"
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#include "modules/audio_processing/aec3/fft_buffer.h"
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#include "modules/audio_processing/aec3/fft_data.h"
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#include "modules/audio_processing/aec3/matrix_buffer.h"
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#include "modules/audio_processing/aec3/vector_buffer.h"
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#include "rtc_base/constructormagic.h"
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namespace webrtc {
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// Provides a buffer of the render data for the echo remover.
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class RenderBuffer {
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public:
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RenderBuffer(size_t num_ffts_for_spectral_sums,
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MatrixBuffer* block_buffer,
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VectorBuffer* spectrum_buffer,
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FftBuffer* fft_buffer);
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~RenderBuffer();
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// Clears the buffer.
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void Clear();
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// Insert a block into the buffer.
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void UpdateSpectralSum();
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// Gets the last inserted block.
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const std::vector<std::vector<float>>& MostRecentBlock() const {
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return block_buffer_->buffer[block_buffer_->read];
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}
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// Get the spectrum from one of the FFTs in the buffer.
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rtc::ArrayView<const float> Spectrum(size_t buffer_offset_ffts) const {
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size_t position = spectrum_buffer_->OffsetIndex(spectrum_buffer_->read,
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buffer_offset_ffts);
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return spectrum_buffer_->buffer[position];
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}
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// Returns the sum of the spectrums for a certain number of FFTs.
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rtc::ArrayView<const float> SpectralSum(size_t num_ffts) const {
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RTC_DCHECK_EQ(spectral_sums_length_, num_ffts);
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return spectral_sums_;
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}
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// Returns the circular buffer.
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rtc::ArrayView<const FftData> Buffer() const { return fft_buffer_->buffer; }
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// Returns the current position in the circular buffer.
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size_t Position() const { return fft_buffer_->read; }
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private:
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const MatrixBuffer* const block_buffer_;
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const VectorBuffer* const spectrum_buffer_;
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const FftBuffer* const fft_buffer_;
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const size_t spectral_sums_length_;
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std::array<float, kFftLengthBy2Plus1> spectral_sums_;
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RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(RenderBuffer);
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AEC3_RENDER_BUFFER_H_
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